"...being brought across arrests aging but doesn't reverse it, so it's a big leap for me to think that whatever causes that would go further in a living mortal who was otherwise not being changed as much."

I think this is a good point. Certainly, it never occurred to me—until the recent discussion on FORKNI-L—that anyone thought that Dr. Jurgen's patients had been...mmmm...youthened (so to speak). Rather, I saw this episode as taking a theme from folk legend. You know the one I mean:

A man is stolen away to fairy land, and lives there unaging for a century. Finally, he insists on returning to his own country, not realizing how many years have passed. Permission is granted; but he is warned not to set foot to the ground. For some reason, he feels compelled to break his word and leaps off his horse, only to age instantaneously through all the lost years.

Well, you can see the parallel—and it assumes that the women retain their youthful appearance, just as the man in the old story did.

I kept meaning to take part in that FORKNI-L discussion, but then would get sidetracked into something else, instead of taking the time to compose what would have been a very long answer. There were a few other comments I would have made—if I could only remember them now!